一种基于链路状态的舱内环境自适应干扰消除算法  

Link-state-based adaptive interference cancellation for cabin in spacecraft

作　　者：梁薇[1] 黎军[1] 李静玲[1] 崔涛[1] 魏佳圆[1] 张怡[1] LIANG Wei;LI Jun;LI Jingling;CUI Tao;WEI Jiayuan;ZHANG Yi(China Academy of Space Technology(Xi'an),Xi'an 710100,China)

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《中国空间科学技术》2023年第2期128-134,共7页Chinese Space Science and Technology

基　　金：国家重点实验室稳定支持基金(HTKJ2021KL504006);重点实验室基金项目(6142411442212)。

摘　　要：针对舱内无线光传输系统多种干扰问题,比如多径损耗和突发干扰等,提出一种基于链路状态的自适应干扰消除技术,该方法分析舱内链路状态,完成链路状态估计,采用环境自适应的变遗忘因子RLS(recursive least squares)算法,针对不同链路状态采取差异化的干扰消除策略,以提高舱内通信质量。仿真结果表明:该算法在尽力避免增加算法复杂度的条件下,相对于传统固定遗忘因子算法,在平稳状态下优先保证传输的误码性能,在链路状态变化时具有更好的收敛性能,灵活适应了舱内多种传输情况。Focusing on the multi-interference problem of wireless optical ACO_OFDM system in spacecraft cabins,such as multi-path loss and burst interference,a method of link-state-based adaptive interference cancellation was proposed.The in-cabin link state for link-estimation was described.The method used an environment-adaptive RLS(recursive least squares)algorithm with variable forgetting factor,and adopted a differentiated interference elimination strategy for different link states,in order to improve the communication quality in the cabin.Simulation results show that the proposed method has better BER performance in the stationary state and better convergence performance when the link state changes,compared with the traditional algorithm which uses fixed forgetting factor,under the premise of avoiding the complexity of the algorithm.Therefore,the proposed algorithm can flexibly adapt to multiple transmission situations in the cabin.

关 键 词：舱内 非对称限幅光正交频分复用 干扰消除 递归最小二乘 链路状态 

分 类 号：TN927.2[电子电信—通信与信息系统]